When you click on the link to the UGS Graduate Bulletin (see links list on the right, third link from the bottom), you will be seeing a page with a list of more links. While all these links contain much important info, direct your attention to the Comprehension Degree Program Information link.
From this link, you will be led to a listing of all the graduate programs within the College. By investigation each departmental or program offering, you may learn about the different PhD minors available and what their requirements are, the courses within each department or program which carry graduate credit, who is on the graduate faculty, etc.
It's a great resource.